Fig. 5 - Typical direct drive turbo blower.
Ensure that the electrical power cannot be accidentally applied to the motor while the casing
Remove both self-tapping screws (22) holding the front half of the casing to the outlet adapter.
Remove all of the hex head bolts (14) located around the casing flange.
Separate the two halves. The two halves are factory sealed with a resin coating. To facilitate their separation, It
is recommended that a knife be drawn along the joining edge of the halves. Moderate force may be required to
overcome the seal between the casing halves.
Loosen the three setscrews (5) at the rear of the impeller hub.
Pull the Impeller from the shaft. DO NOT REMOVE THE STUD OR LOCK NUT AT THE CENTER OF THE
Inspect the Impeller and replace If necessary.
Clean any burrs from the shaft caused by the setscrews If necessary, use an emery cloth to restore a smooth
Apply an antiseize compound to the Impeller hub bore and the shaft.
Place the motor shaft keyway at the 12 oclock position and insert the key.
After ensuring that the impeller hub keyway is aligned with the key on the motor shaft, slide the impeller on the
Replace the front half of the casing and tighten all casing hex head bolts (14).